city health workers think there are even more cases in the city where people aren't even aware that they're infected. that's why couriers were hard at work today, dropping pacts of larvaicide into storm drains around the city. park officials say the windy climate in san francisco actually isn't hospitable for mosquitoes. >> people are speculating about differences in climate then rainfall and mosquito density. it's really hard to know why we're having it at this time. >> the program was started seven years ago. >>> san francisco police say a man wanted on murder charges has surrendered. 20-year-old dylan lamali. police say the victim was shot to death after an argument on treat street. investigators say family members convinced lamali to surrender. adrian landers was also arrested in connection with this same case. >>> come march 1, overnight parking of large recreational vehicles on many san francisco streets will be illegal. it was approved in a 7-4 vote. supporters said residents have long complained people were living in many rv's, and making the streets dirty. not determining exactly w